The worst thing that can happen to someone who is traveling through the desert, is to be stuck. As we arrived at the border of Mauritania (coming from Western Sahara), about 35 vehicles were already in front of us, also waiting to cross the frontier. It took us long seven hours for the whole border crossing procedure.
Another nightmare of touring across a desert is to have a car brake down. On our way through the Sahara, a Mauritanian family had a blow-out in the middle of nowhere. Though they were carrying a spare tire, they had no proper tool to lift their car. So, we stopped and helped changing tires by using our jack.